subject=Re:[EE:] - Heat sink??
source= http://www.piclist.com/piclist/2006/11/23/121602a.txt?

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Thanks for all the help. Sorry, I didn't get back sooner, but I didn't
get copied on the replies.

The comments of the wall wart high voltage - probably can pick a wall
wart with a lower voltage that will provide reliable voltage above the
5VDC out of the regulator, maybe 6 or 9 VDC. That should reduce the heat
considerably.

One of the drawbacks of heatsinking the regulator to the aluminum box is
thermal expansion. The PCB (it's less than 2" x 2") also has fiber optic
transmitter and receiver on it that are threaded and double nutted
through the box wall. Probably the expansion between the board and box
won't be an issue, but reliablity long term (30 years or so) is
important. Would be nice to have a flexible pad that would conduct heat
good.
:)

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